(A) Water pipe materials. Distribution mains shall be cast iron, ductile iron, asbestos-cement, reinforced concrete plastics or other materials designed for potable water system service and shall be the appropriate AWWA standards, Section C or NSF Standards No. 14 and No. 15 or approved equal standards. Copies of AWWA Standards are available from American Water Works Association, 666 W. Quincy Avenue, Denver, Colorado 80235, at a cost of $140 per complete set for nonmembers, or $70 for members. Copies of NSF Standards are available from the National Sanitation Foundation, NSF Building, Ann Arbor, Michigan 48105 at a cost of $25 per complete set. Copies are available for public inspection at the principal address of the Environmental Health Section, Division of Health Services. The pressure rating class of the pipe shall be in excess of the maximum design pressure within that section of the Water Distribution System. The quality of pipe to be used shall be stated in the project specifications.
(B) Cross-connections.
(1) No potable water supply shall be connected by any means whatsoever to another source of water supply, or to a storage facility, unless the connection has been previously approved by the Division of Health Services. No connection shall be made to any plumbing system that does not comply with the State Building Code, Volume 11, or any applicable local plumbing code.
(2) No person shall introduce any water into the distribution system of a public water supply through any means, other than from a source of supply duly approved by the Department of Human Resources, or its representative.
(3) In cases where storage capacity is used only for non-potable purposes and there is installed either an elevated tank, or a ground reservoir, the following precautions shall be taken:
(a) When the reservoir or elevated tank is filled from a supply, other than a public water supply, and the public water supply is used as a supplemental supply, the pipeline from the public water supply shall be installed in a manner so that the water will be discharged over the top or rim of the reservoir or elevated tank. There shall be a complete physical break between the outlet end of the fill pipe, and the top or overflow rim of the tank or reservoir of at least twice the inside diameter of the inlet pipe; and
(b) When the elevated tank or ground storage reservoir is filled entirely by water from a public water supply:
1. If a covered ground reservoir or covered elevated storage tank is used, an approved reduced pressure back-flow preventer, or an approved double check valve assembly may be used. The backflow prevention device shall be installed in a manner so as to afford adequate protection and shall be easily accessible and shall include all necessary pressure gauges and drains for testing. Gate valves shall be installed in the line at both ends of the backflow prevention device; and
2. If a recovered ground reservoir of recovered elevated storage tank is used a complete physical break shall be provided between the reservoir or elevated tank and the public supply. The physical break between the inlet pipe and the top or overflow rim of the reservoir shall be at least the diameter of the inlet pipe.
(4) All cross-connections between potable water supplies and non-potable or unprotected supplies, which are not specifically covered in the categories in this division (B), will be considered as special problems and the protective devices required will be determined by the Department of Human Resources on the basis of the degree of health hazard involved.
(5) Persons desiring to install non-potable water supplies in conjunction with a public water supply shall submit to the Environmental Health Section, Division of Health Services, detailed plans and specifications in triplicate, showing the non-potable water supply and its relation to the potable water supply.
(6) Any such interconnection to a potable water system is subject to the approval of the water supplier and shall not be made until authorized by the water supplier in addition to the Department of Human Resources.
(Prior Code, § E-V-8)